A suspect in the killings of at least three people in a weekend crime spree in the Houston area was arrested on Tuesday, bringing some relief after police warned residents in and around the largest city in Texas to be on "high alert".

The caller spotted a Nissan Sentra that authorities had earlier said was being driven by Jose Gilberto Rodriguez, 46, a felon who spent decades in prison before being released past year.

Rodriguez led police on a chase that started around Eldridge and Fallbrook.

"At this point I would have to say that from all evidence what we're seeing so far, that's what we're facing right now - a possible serial killer", said Harris County Sheriff Ed Gonzalez. "Let's get this man off the street as soon as possible".

Then on Monday, an employee of Houston Mattress One was found shot to death at the store that employed him. He is a registered sex offender.

"We've had several cases where somebody cuts their monitor, and the next thing you know they're murdering somebody". Police say a third charge is pending and will likely be filed tomorrow.

Harris County Sheriff's deputies said there was a pistol inside the auto.

During the news conference, police said they were not searching for any additional suspects and that Rodriguez had not said anything to authorities thus far.

Rodriguez was paroled in September 2017. Her body was found after her brother called police to conduct a welfare check because she had not been answering her phone. Her vehicle, a 2004 Chrysler PT Cruiser, was stolen from her home and found abandoned the next day at nearby Willowbrook Mall. He said Rodriguez may have been looking for someone. "This person should be considered armed and extremely unsafe".

Officials say the reign of terror continued Monday when Rodriguez shot and wounded a 22-year-old contract METRO Lift driver.

Mall surveillance video showed a man, believed to be Rodriguez, walking through the mall and exiting the opposite side.

The first victim, Pamela Johnson, 62, was found dead Friday night inside her home in northwest Harris County after her family called authorities because they couldn't reach her.

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